<template>
<div class="custom-tree-container">
    <p>使用 scoped slot</p>
    <el-tree
      :data="data"
      show-checkbox
      node-key="id"
      :props="defaultProps"
      default-expand-all
      :default-checked-keys="[5,10]"
      :expand-on-click-node="false">
      <span class="custom-tree-node" slot-scope="{ node, data }">
        <span>{{ node.label }}</span>
        <span>
          <el-button
            type="text"
            size="mini"
            @click="() => append(data)">
            Append
          </el-button>
          <el-button
            type="text"
            size="mini"
            @click="() => remove(node, data)">
            Delete
          </el-button>
        </span>
      </span>
    </el-tree>
  </div>
</template>

<script>
  let id = 1000;
  import {ynow
    ,savey
    ,findy
    ,dely
  } from "@/api/yready";

  export default {
    beforeRouteUpdate(to,from,next){
      console.log("beforeRouteUpdate,now.vue");
      this.getNowData(to.query.pid);
      next();
    },
    data() {
      const data = [{
        id: 1,
        text: '一级 1',
        children: [{
          id: 4,
          text: '二级 1-1',
          children: [{
            id: 9,
            text: '三级 1-1-1'
          }, {
            id: 10,
            text: '三级 1-1-2'
          }]
        }]
      }, {
        id: 2,
        text: '一级 2',
        children: [{
          id: 5,
          text: '二级 2-1'
        }, {
          id: 6,
          text: '二级 2-2'
        }]
      }, {
        id: 3,
        text: '一级 3',
        children: [{
          id: 7,
          text: '二级 3-1'
        }, {
          id: 8,
          text: '二级 3-2'
        }]
      }];
      return {
        defaultProps: {
          children: 'children',
          label: 'text'
        },
        data: JSON.parse(JSON.stringify(data))
      }
    },

    methods: {
      append(data) {
        const newChild = { id: id++, text: 'testtest', children: [] };
        if (!data.children) {
          this.$set(data, 'children', []);
        }
        data.children.push(newChild);
      },

      remove(node, data) {
        const parent = node.parent;
        const children = parent.data.children || parent.data;
        const index = children.findIndex(d => d.id === data.id);
        children.splice(index, 1);
      },
      getNowData(id){
        ynow({pid:id})
          .then(res => {
            this.data = res.data.maptree;
          });

      }


    }
  };
</script>

<style>
  .custom-tree-node {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 14px;
    padding-right: 8px;
  }
</style>
